Dingyuan in context: Street-network sprawl trends

Dingyuan in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
DingyuanAnhui (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dingyuan plotted against Anhui and China. The SNDi of new construction in Dingyuan peaked in 1976-1990, compared to Anhui which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Dingyuan's incremental SNDi fell from 2.58 to 1.57 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dingyuan ranked 21st out of 74 cities in Anhui and 292nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.57
Rank in China
85th of 1843
Rank in Anhui
9th of 74

Entire Network (Aggregate)

SNDi value
2.12
Rank in China
292nd of 1843
Rank in Anhui
21st of 74

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
DingyuanLeonLqliaa

In new street additions, Dingyuan built increasingly disconnected streets from 1975 through 1976-1990, then improved, while León built increasingly disconnected streets over time and Lqliaa built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Dingyuan and Lqliaa both grew more disconnected from 1975 through 1991-2005, then improved, while León became progressively more disconnected. Dingyuan and León have been converging in their street-network character since 1975.